Case Converter

Available conversion types

The uppercase and lowercase converter transforms your text between different formats with a single tap, without retyping it. It's perfect for fixing text you wrote with caps lock on, formatting a title or creating the classic alternating-case text.

Type or paste your text and you'll instantly see six versions, each ready to copy with one click:

• UPPERCASE: turns every letter uppercase (ideal for headlines or emphasis).
• lowercase: makes everything lowercase, perfect for undoing text typed in CAPS.
• Title Case: capitalizes the first letter of every word.
• Sentence case: capitalizes only the first letter of each sentence, like normal text.
• aLtErNaTiNg: alternates upper and lowercase letter by letter, the classic meme style.
• iNVERSE: flips the current case of each letter (uppercase becomes lowercase and vice versa).

How to use the converter

1. Type directly or paste the text you want to convert.
2. The six versions appear instantly, with no button to press.
3. Pick the format you need and tap its card to copy it.
4. Paste the result wherever you need it.

Correct capitalization by language

Not every language capitalizes the same way. Our tool uses the rules of the page's language, so it respects accents (á → Á, ñ → Ñ) and special cases like Turkish, where lowercase "i" becomes dotted "İ" and "I" becomes dotless "ı". This avoids the mistakes many generic converters make.

What each mode is for

• Fix all-caps text: switch a message typed by mistake in CAPS to lowercase or sentence case.
• Titles and headings: use uppercase or title case for a professional look.
• Social media and memes: alternating case is the favorite for an ironic tone.
• Forms and data: normalize names or addresses to a consistent format.
• Coding and spreadsheets: unify text formatting before using it.

Usage tips

• Sentence case doesn't always get proper nouns right: review it if your text has them.
• For names and surnames, title case usually gives the best result.
• If a language has special rules, make sure the page is in that language for correct conversion.

Privacy: everything happens in your browser

The text is converted entirely on your own device; nothing is sent to any server, so you can work with private information without worry.

Common use cases

Switching between upper and lowercase is a daily task in many contexts:

Where it's used most

• Students and office: formatting titles, headings and documents.
• Community managers: creating posts with the right style for each network.
• Design and branding: testing how a name looks in different formats.
• Developers: normalizing text and labels before processing.
• Proofreading: quickly fixing text written all in caps.

Alternating case in memes

Text with alternating upper and lowercase (lIkE tHiS) became popular online to convey sarcasm or mockery when quoting something. Our "alternating" mode generates it automatically so you don't have to go letter by letter.

Frequently Asked Questions